Linearization of dynamic loudspeaker system using third-order nonlinear IIR filter
Linearization of dynamic loudspeaker system using third-order nonlinear IIR filter
复制标题
使用三阶非线性 IIR 滤波器对动态扬声器系统进行线性化
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Y. Kajikawa
中科院分区：
文献类型：
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作者：
Kenta Iwai;Y. Kajikawa
在本文中，我们提出了一种三阶非线性 IIR 滤波器，用于补偿扬声器系统的非线性失真。基于镜像滤波器的二阶非线性IIR滤波器用于减少扬声器系统的非线性失真。然而，二阶非线性IIR滤波器不能减少高频下的非线性失真，因为它不包括扬声器系统自感的非线性。另一方面，所提出的滤波器包括这种自感的效应，因此可以减少高频下的非线性失真。实验结果表明，所提出的滤波器在高频互调失真方面比传统滤波器可以减少4 dB以上。
In this paper, we propose a 3rd-order nonlinear IIR filter for compensating for nonlinear distortions of loudspeaker systems. The 2nd-order nonlinear IIR filter based on the Mirror filter is used for reducing nonlinear distortions of loudspeaker systems. However, the 2nd-order nonlinear IIR filter cannot reduce nonlinear distortions at high frequencies because it does not include the nonlinearity of the self-inductance of loudspeaker systems. On the other hand, the proposed filter includes the effect of such self-inductance and thus can reduce nonlinear distortions at high frequencies. Experimental results demonstrate that the proposed filter can realize a reduction by 4 dB more than the conventional filter on intermodulation distortions at high frequencies.